Removing ghost USB share

What version of ReadyNAS OS are you running?

Perhaps give NetGear support a call and post the case number NetGear gives you. You do have 90 days of free basic phone support after purchase of your new ReadyNAS. After that and at any time you can also make use of online support.

Running 6.0.4 at the moment, if I am reading it correctly.
The support guys were going to be my next route, if nobody had any quick and easy ideas.
NETGEAR Online Case Submission Case # 21074342 .

I had the same problem. I downloaded an update from somewhere on the Netgear site called clean USB storage which resolved the problem.

That Clean_USB_Storage add-on is not available for the RNOS6 platform, so they can't use that in this case.

Is there any way to get the ReadyNAS to simply call all USB Hard Drives USB_HDD_1? Or get it to let two different USB drives to have the same name?

At present, I rotate between two 2TB identical USB drives for resync backup on my ReadyNAS Duo (sparc), but because the ReadyNAS insists on giving them different names, I have to have two different backup jobs set up that require a lot of manual intervention as only one USB drive is plugged into the ReadyNAS at any one time, as the other is stored off site. It would be much easier (and elegant) if I could just swap the drives and have just one backup job run on schedule to what it thinks is always the same drive. I can sort-of kludge that up by running Clean_USB_Storage every week and setting whichever drive is plugged in to be USB_HDD_1, but again, that's a lot of kludgey manual intervention that should not be necessary.

Sorted by Level3 support. Latest firmware version prohibits changing the USB's allocated name, so I guess it is a bit of a problem if you do. Took a while for them to clear out all the old references, but it's gone now.
Thank you Netgear!
Just have to get my backups working properly now...